Novel Styrylquinolinium Dye Thin Films Deposited by Pulsed Laser Deposition for Nonlinear Optical Applications

Abstract

ABSTRACT:The nonlinear optical (NLO) properties of novel styrylquinolinium dye thin films for photonic applications have been studied by the Z-scan, second harmonic generation (SHG), and third harmonic generation (THG) techniques, providing both the second-and third-order nonlinear optical parameters. The styrylquinolinium dye (E)-1-ethyl-4-(2-(4-hydroxynaphthalen-1-yl)vinyl)quinolinium bromide was synthesized by the Knoevenagel condensation, and its structure and physicochemical properties were determined by 1 H NMR, 13 C NMR, FTIR, UV−vis spectroscopy, and elemental analysis. Functional thin films were deposited by pulsed laser deposition (PLD) using UV TEA N 2 laser onto glass substrates and KCl, NaCl monocrystals at room temperature and vacuum at 10 −3 mbar/0.1 Pa. Further characterization of the films and target from native material by FTIR spectroscopy revealed that there was no difference between the deposited films and the initial material. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) measurements have been also performed in order to provide information about the morphology and topology of the thin films.

Synthesis and Third‐Order Nonlinear Optical Properties of Triphenylene Derivatives Modified by Click Chemistry

“…The fact that the CATP2 system exhibits a maximum absorption at the longest wavelength (750 nm) among the investigated compounds reflects the highest charge‐transfer interactions occurring between the electron‐donor (amino) and the electron‐acceptor (cyano) groups. This enhancement of the charge‐transfer efficiency, if compared to CATP1 , could be attributed to an increment of the π‐conjugated range by the quinone groups 13…”

Non-linear Thermo-Optical Properties of MoS2 Nanoflakes by Means of the Z-Scan Technique

“…For the past few decades, the subjects that have stolen the spotlight of the theoretical and experimental interests are the linear and non-linear optical response of semiconductors [1,2]. Recently, among the novel two-dimensional (2D) materials, transition metal dichalcogenides (TMDCs) with the general formula MX 2 , where M refers to a transition metal and X refers to a chalcogen (S, Se, or Te), has shown particularly promising electronic and optoelectronic properties [3][4][5].…”

Synthesis and Nonlinear Optical Studies on Organic Compounds in Laser-Deposited Films

“…For each type, there are several techniques applied. Physical deposition techniques for thin organic films include physical vapor deposition (PVD) [38][39][40][41][42], organic vapor phase deposition (OVPD) [43][44][45], organic molecular beam deposition (OMBD) [46][47][48][49][50][51], solvent vapor annealing (SVA) [52][53][54][55][56], self-assembled monolayers (SAMs) [57,58], inkjet printing [59,60], pulsed laser deposition (PDL) [61][62][63][64], and laser evaporation [65][66][67] techniques. The chemical methods include solution techniques and gas-phase deposition methods.…”